Browser: IE8, IE9 in IE8 mode

Version: 1.7.1, 1.7.2 and jquery-git (2012-08-01)

Here's a full description of the issue:

http://pdfcast.org/download/jquery-calendar-problem.pdf

The short version:

• document.body has a jquery change event on it
• when a jquery ui calendar's month select list is used to change the month
• jquery crashes in (data.js) removeData as jqui is trying to replace the calendar

because the select list's removeAttribute property's type is unknown and just testing for causes an error.

} else if ( elem.removeAttribute ) {

• the select list's removeAttribute starts out ok when the date picker is being created and jquery.append initially creates the fragment but becomes 'unknown' when it's actually appended to the document after

this.appendChild( elem );

This is the same issue as #9476. Of course a simple jsfiddle works fine. When the calendar is added to the document its month select list's removeAttribute remains typeof === object. I am going to try to keep whittling down my fail case and get it into a jsfiddle and in the mean time add a typeof test to our local version of jquery.

What I do know...

• Fails in IE8 regardless of doctype
• Works in IE9 with html5 doctype or with IE9 meta tag
• Fails in IE9 with IE8 meta tag